Boring-machine.



E. J. ROLLINGS.

BORING MACHINE.

APPLICATION FILED ocr. 31. 1916.

I0 SHEETS-SHEET I.

Patented June 12,1917.

E. J. ROLLINGS.

BORING MACHINE.

APPLICATION FILED OCT. 31, 1916.

Patented J une 12, 1917.

10 SHEETS-SHEET 2K ET'WZ E0 E. J. ROLLINGS.

BORING MACHINE.

APPLICATION FILED OCT. 3|, I916.

Patented June 12, 1917.

10 SHEETSSHEET 3- IIIIIIIIIIIIII//.

Iwew/Zor Erneei f fi zzw s, Z Z15 E. ROLLINGS.

BORING MACHINE.

APPLICATION FILED OCT. 31. 1916.

Patented June 12, 1917.

10 SHEETSSHEET 4.

l7 1vercZ0'/? Frneai J Lo Z 7116 flaw j 1%75 E. J. ROLLINGS.

BORING MACHINE.

APPLICATION FILED OCT. 31. 1915 Patented June 12, 1917.

10 SHEETS-SHEET 5.

E. J. ROLLINGS.

BORING MACHINE.

APPLICATION FILED OCT. aI. 1916.

LQ3,U3% Patented June 12,1917.

10 SHEETSSHEET 6.

E. J. ROLLINGS.

BORING MACHINE.

APPLlCATlON FILED OCT. 3|. l9l6.

Patented June 12, 1917.

10 SHEETS-SHEET E. J. ROLLINGS.

BORING MACHINE.

APPLICATION FILED OCT. 3|, IBIS.

Patented June 12, 1917.

I0 SHEETSSHEET 8.

E. J. ROLLINGS.

BORING MACHINE.

APPLICATION FILED ocr. s1

' Patented June 12, 1917.

l0 SHEETSSHEET 9- E. J. ROLLINGS.

BORING MACHINE.

APPLICATION FILED 00131. 1916.

jifimfi -o Patented June 12, 191?.

10 SHEETS-SHEET l0.

ERNEST J. ROLLINGS, OF PHILADELPHIA, PENNSYLVANIA.

BORING-MACHIN E.

Specification of Letters Patent.

, Patented June 12, 191?.

Application filed October 31, 1916. Serial No. 128,740.

To all whom it may concern: I

Be it known that I, ERNEST J. ROLLINGS, a subject of the King of Great Britain and Ireland and the Isle of Man,.and a resident of Philadelphia, county of Philadelphia, State of Pennsylvania, have invented certain Improvements in Boring-Machines, of which the following is a specification.

My invention relates to certain improvements in boring machines of the type in which the work is carried by rotating chucks and the tool is carried by a bar which projects from a driving head so that the bar canenter the work and the tool will make the cut inside the work.

One object of the invention is to design a boring machine of the above mentioned type so that two or more tool chucks can operate at the same time.

Another object of the invention is to provide means for automatically projecting and retracting the toolon each chuck.

. A further object of the invention is to design the boring bar so that a long hole of comparatively small diameter can be bored, the bar having suflicient strength to resist the strains to which it is subjected when the tools are in action. I

A still further object of the invention is to provide means for rigidly supporting the boring bar and another object of the invention is to construct the chucks which hold the work so that the work can be rotated positively.

Still another object of the invention is to provide means for adjusting the cam bar to control the movement of the cutting tool so that it can be moved while the tool carriage is stationary in order to project the tool toward the work to cut abrupt angled shoulders.

The invention also relates to certain details which will be fully described hereinafter. reference being had to the accompanying drawings, in which: Figure 1, is a plan vi boring machine;

- Fig. 2, is'a side view;

Fig. 3, is a transverse sectional view on the line 3-3, Fig. 1;

Fig. 4, is an enlarged transverse sectional view on the line 44, Fig. 1;

Fig. 5, is a transverse sectional view on the line 55, Fig. 6;

ew of my improved Fig. 6, is a section on the line 66, Fig. 5,

tool;

showing the boring bar and tool carrier in outside view; I

F 1g. 7, is a sectional plan view on the line 77, Fig. 5;

Fig. 8, is a sectional view on the line 88, F ig. 6;

Fig. 9, is a sectional view on the line 99, Fig. 6;

Fig. 10, is a perspective view of the cam for controlling the movement of the cutting Fig. 11, is a detachedperspective view of the tool holder;

Fig. 12, is an enlarged end view of a portion of one of the chucks showing the work 1n section;

Fig. 13, is a sectional view on the line 13-13, Fig. 12,-

Fig. 14, is a side View of means for adj usting the cam bar to control themovement of the cutting tool;

Fig. 15, is a sectional view on the line 15-15, Fig. 14;

Fig. 16, is a view of the lever mechanism for positively retracting the tool; and

Fig. 17 is a view of one form of adjustable bearing for the boring bar.

I will first give a brief description of the machine.

On the bed plate, which is of any length desired, according to the work to be bored,

is mounted a head carrying the boring bar, which is of a greater length than any work to be finished on the machine. has a longitudinal movement on the bed This head sufficient to retract the boring bar clear. of

mechanism in the head traverses the tool carriers. Secured to each side of the boring bar is a cam plate, which is arranged to springs so that as the tool carriage travels over the cams the tool will. be projected and retracted, according to the shape of thecams. Thus, an entire tubular structure for instance can be completely finished in any manner desired.

While the invention is adapted for boring force the tools out against the pressure of irregular internal shapes of all types, .it is especially adapted for finishing the interior of torpedo casings and, therefore, the mechanism must be accurate. The chucks are adjustably mounted on the base and jaws are provided for rigidly holding the work. These jaws are power driven as it will be understood thatthe work rotates while the guideways 12one at each side.

guideways are undercut to receive the tool" ,clearly shown in Fig. 5.

boring tool has a longitudinal movement in respect to the work.

Referring to the drawings, 1 is the base having guideways 2. 3 is a head mounted on the guideways of the base. On the base is a longitudinal rack 4 with which engages a pinion 5 on a shaft 6 carried by the head and driven in any suitable manner from an electric motor 7. 8 is an operating lever, on moving which the carriage can be shifted longitudinally on the bed. 9 is the boring bar of a greater length than 'the work to be bored and the outer end of this boring bar is reduced in the present instance, as

shown in Figs. 1 and 2, and is adapted to a bearing 10 at the extreme end of the machine and canbe held therein by a set screw .11 so that when the tools are working the boring bar is rigidly held at both ends, but when the boring bar is being adjusted to the work it overhangs the head 3 and is of substantial cross section so as to rigidly carry its weight without deflection. The boring bar 9 is made in cross section, as illustrated in Figs. 4 and 5, and has two These carriages 13. Extending longitudinally in each guidewayis a feed screw 14 located as One-half of the screw engages the tool carriage so as to move it longitudinally. Each screw has a clutch 15 at the extreme end and arranged to be actuated by levers 16 to engage the driving heads 17 of the driving mechanism so that on operating the levers 16 either one or both of the screws can be driven. I have not described the details of the mechanism within the head 3, as this may be modified without departing from'the details of the invention.

By making the bar in the manner shown so that the tool carriages are located 1n recesses in the bar, I am enabled to make a bar of comparatively small cross section and yet of sufficient strength to withstand the lever having a pin 20 arranged off center which enters the groove '21 in the plunger 18, and by mov'ng the hand lever the plunger can be moved into and out of engagement with the feed screw. When it is desired to move the tool carriage by hand, a shaft 22 is provided having a head 23 to which a wrench can be applied and on the inner end of this shaft 22 is a pinion 24 which meshes with the threads of the screw so that when the plunger 18 is withdrawn This cam bar is secured in any suitable manner to the boring bar and is of' a length equal to the travel of the carriage, as itwill be understood that'in this type of machine there may be two or more carriages on each a limited movement, although, in some instances, thecam bar may extend the full length of the boring bar and a single car riage' may be used. Adjustably carried by the tool post is a bearing block *30, which bears against the face of the cam bar and controls the movement of the tool post. This bearing block can be adjusted by a screw 31 mounted in hearings in the tool post and this screw isprovided with a head to receive the wrench. The screw, in the present instance, is made with two sets of threads, one adapted to a thread in the post and the other in the bearing block so as to provide for minute adjustments.

In-order to lock the screw in the position I to which it is adjusted, I provide a clamp pin 32 actuated byan adjusting screw 33, which actuates a block 34 having a tapered end. Thus it will be seen that the tool carriage is moved longitudinally in the guides of the boring bar and the movement 'ofthe tool toward the work is controlled by the outside cam bar and the movementof the tool from the work is controlled by a spring.

In order to insure the proper moving of the cutting tool from the work so as not to depend entirely upon, the action of the spring, I provide a lever62 which is attached to the block 30 by a pin 63, a cam 29 on the cam bar 29 actuates the lever so that it will positively move the tool back from the work, see Fig. 16. This is particularly adapted for use where the cut is 'heavy and where the side friction on the vside of the boring bar, each carriage having the finished interior of the material clamped to in the chucks, the tool will accurately bore the interior of the shell or other tubular structure to conform to the design of the cam bar.-.

The work to be bored is held in the present instance by two chucks mounted on the base 1 and illustrated in Figs. 4, 12 and 13. The two chucks 35 are similar in construction, therefore, I will only described one chuck. The chuck 35has a base section 36 and a cap 37 secured thereto by bolts 38. The chuck is arranged to slide on the base 1 and has plates 39 on each side extending under the flange of the base in the ordinary manner. The rack 4, which extends throughout the length of the base, is engaged in the present instanceby a plnion 40 geared to a hand operated shaft 41 so that on applying a handle to the end of the-shaft 41 the chuck can be moved to any position desired. Mounted in the chuck is-acarrier 42 to which is attached a Worm wheel 43, which meshes with a worm 44 on a transverse work shaft 45 adapted to bearings in the base section 36 of the chuck. On the outer end of this shaft is a bevel wheel 46, which meshes with a bevel wheel 47 shown in dotted lines in Fig. 4, and splined to the shaft 48 driven through a train of gears 49, as shown by dotted lines in Fig. 1, from the shaft 50 of the motor 51, an electric motor in the present instance. The gears 46 and 47 are located within a box 36 projecting from the base section 36 of the chuck, and this box also forms one of the bearings for the shaft 48 so that when the shaft 45 is turned the chuck carrier is turned with it. v Mounted on the carrier are three jaws 52, which are undercut at the back and adapted to undercut recesses in the carrier 42, as clearly shown in Fig. 4. Secured to the carrier are longitudinal rack bars 53 held to the carrier by screws 54, Fig. 13, and adapted to engage this rack bar is a worm wheel 55 on a shaft 56 carried by the jaws 52. The head 57 is formed on the end of the shaft 56 so that when a wrench is applied the shaft 56 and its worm wheel-55 can be turned, and the jaws 52 can be drawn tightly onto the work 00, in the present instance the tube of a torpedo, so as to lock the work firmly to the chuck.

As above remarked, both chucks are similar in construction j and are turned in unisonfrom the same shaft 48 as clearly shown in Fig. 1. Located between one edge of the undercut portion of each jaw 52 and the carrier is a gib 58, which can be taken up by a set screw and nut 59 in the ordinary manner so that the parts of the chuck are rigid.

In some instances, it is necessary to cut. right angled or steep shoulders on the work,

and this I accomplish by disengaging the tool from the feed screw 14 so that it will remain stationary, and move the end cam bar longitudinally, so that it will travel past the tool carrier and feed the tool toward the work. In the present instance this is I accomplished by means of a screw 64 adapted to a fixed bearing 65 engaging a nut 66 on the carrier, Figs. 14 and 15.

60 is a tool carrier arranged to slide on the base 1 and carrying an ordinary tool slide rest 61 holding a tool for finishing the outside of the work when necessary. This invention, and while I have illustrated my invention as particularly adapted for boring the tubular casings of torpedoes, it will be .understood that it can be used for boring the interior of any object which is of such a size as to accommodate a boring bar.

While I have illustrated a spring for holding the tool post against the cam, in some instances other equivalent means may be used without departing from the spirit of the invention.

In Fig. 2, of the drawings, the bearing 10 is shown as stationary, but in tools in which the length of the work varies considerably I may use an adjustable bearing 10 arranged to slide on the base and may be shaped to engage the body of the bar, as shown in Fig. 17.

The operation is as follows The head is moved back by the pinion 5 meshing with the rack 4, drawing with it the boring bar 9 until it is clear of the chucks and the work. The boring bar is of such a construction and the carriage is of such a design that the bar, although having an extended overhang, wilI be rigid. The chucks are separated and the jaws are opened sufliciently to allow the work an to be placed in the chucks, after which they are adjusted and the jaws clamped tightly onto the work. When the head is moved forward, the boring bar enters the work and the end passes therethrough and is, located in the bearing 10, so that the bar is firmly supported both at the inner and outer ends. Prior to the insertion of the bar into the work the particular cams are properly located on the boringbar and the tools are set in their respective positions. The motor 15 is then set in motion, turning the shaft 48, the two chucks, and the work 00. The motor 7 is then started and the clutches 15 are shifted so that the screws 14 on the boring bar are turned and the tool carriages are traversed longitudinally. on the bar, the tool post being projected or retracted according the tool.

to the particular shape of the cam bar. After the work has been finished, the head and the boring bar are moved longitudinally so that the boring barwill clear the work. Then the clutches are shifted so as to release the work, which is removed from the ma: chine and another shell is placed in position.

In Fig. 5, I have shown two longitudinal tubes arranged in the recesses of the boring bar. These tubes supply lubricant to the moving parts of the tool carriage. The de-. tails of the lubricating mechanism have been omitted from the drawings.

I claim: v

1. The combination in-a boring machine, ofa base; a head mounted on the base; a boring bar carried by the head; a bearing for the outer end of the boring bar; chucks mounted on the base to which the work is secured; means for rotating the chucks; a tool carriage on the boring bar; a cam bar on the boring bar; a tool post mounted on the carriage; and means tending to hold the tool post againstthe cam so that the cam will project the tool, the means retracting 2. The combination in a horizontal boring machine, of a base; a head slidably mounted on the base; a boring bar secured to the head; a fixed bearing'at the opposite end of the machine on which the outer end of the .in-each recess; two longitudinal screws on the boring bar, one exposed 1n one recess boring bar is supported when in the working position; chucks mounted on the base and carrying the work through which the boring bar extends, the boring bar being recessed at each side; a tool carriage mounted and the other in the other recess; means on each carriage for engaging its screw so as to feed the carriage longitudinally; means on the head for driving the screws; a longitudinal cam bar located in each recess; a tool post; means for holding the tool post in engagement with the cam bar so that as the carriage .is traversed by the screw the tool moves in conformity with the shape of U the cam bar and makes a cut in the work corresponding to the contour of the cam bar.

3. The combination in a horizontal boring machine, of a base; a head; a boring bar projecting from the head, said boring bar having a longitudinal recess therein forming guides; a tool carriage mounted in the re; cess and arranged to travel on the guides; a

: longitudinal screw exposed in the recess;

and the tool carried thereby will be moved laterally by the cam bar.

4. The combination in a boring machine, of a boring bar recessed at one side; a longitudinal screw located in the recess; means for turning the screw; a longitudinally ar ranged cam bar also located in the recess; a tool carriage arranged to travel longitudinally in said recess; means on the carriage for engaging the screw; a tool post on the tool carriage; a bearing block adj ustably mounted on the tool post and arranged to engage the cam bar; and yielding means for holding the tool .post and its bearing block against the cam so that as the carriage is traversed longitudinally by the boring bar on the screw the tool post and its tool will be moved laterally by the cam bar.

5. The combination in a boring machine, of a boring bar; longitudinal guides thereon; a tool carriage mountedon the guides; means for moving the tool carriage longitudinally; a cam bar mounted on the boring bar; a tool post mounted on the tool carriage; a spring tending to hold the tool post against the cam bar so that as the carriage is moved longitudinally the tool will be projected or retracted as dictated by the cam 6. The combination in a boring machine, of a head; a boring bar carried thereby, said boring bar being recessed at each side and having longitudinal guides formed thereon;

a tool carriage mounted at each side of the boring bar; two longitudinal screws, one located on one side and the other on the opposite side of the boring bar, one screw being arranged to traverse one carriage and the other being arranged to traverse the other carriage; a longitudinal cam bar arranged at each side of the boring bar within the recess; a tool post on each carriage bearingagainst the cam bar; and means for yieldingly'holding the post against the bar,

one'carriage being out of line with the other so that the two cutting tools are acting on work at different locations.

. 7.. The combination in a boring machine, of a base; a longitudinally movable head thereon; a boring bar carried by the head; two chucks mounted on the base; means for turning the chucks; a carrier mounted in each chuck; means for turning the carriers in unison; jaws mounted on each carrier for clamping the work, said jaws being tapered; a rack bar for each jaw secured to the carrier; a shaft on each jaw having a worm wheel engaging therack so that on turning the shaft the jaws will be moved to and from the work.

8. The combination in a horizontal boring machine, of a base; ,a head mounted to slide on said base; a boring bar carried by the head and overhanging the base; a fixed bear ing at the opposite end of the machine to bar; means for'traversing the tool carriage;

' ing machine, of a base; a head longitudinallyreceive the end of the boring bar; means for securing the boring bar firmly in the hearing; two chucks mounted on the base; a carrier mounted in each chuck; jaws adjustably mounted in the carriers and arranged to clamp the work; a shaft at one side of the machine arranged to turn both carriers in unison; means for driving the shaft; a tool carriage on the bar a tool post thereon; means for moving the tool carriage longitudinally; and a cam on the bar for controlling the lateral movement of the tool post on the tool carriage. v. 4

9. The combination in a boring machine, of a boring bar; means for carrying said bar; a-tool carriage mounted on the boring a cam bar longitudinally arranged on the boring bar; a tool postlaterally slidable on the tool carriage; a boring block adjustably mounted on the tool post and arranged to bear against the cam bar; a spring having one end connected to the tool post and the other to the tool carriage; an adjusting screw; a clamp pin for engaging the adjusting screw; a screw; and a tapered block actuated by the screw vfor forcing the clamp pin against the adjusting screw to hold said adjusting screw in the position to which it is adjusted so that as the carriage is traversed the tool post and its tool will be controlled laterally by the cam bar. 7

10. The combination in a horizontalbormovable on the base and carrying a long,

overhanging boring bar; a motor mounted on-the head; a longitudinal rack on the base; a pinion mounted on the head meshing with the rack and driven by the motor; two longitudinal screws extending on each side of the boringbar and also driven by said motor on the head; clutch mechanism forthrowing the screws into engagement with the motor; a tool carriage mounted on each' side of the boring bar and traversed by the screws; a

. longitudinally arranged cam on each side of the boring bar, said cam being removably mounted on the boringbar; 'a'tool post carried by the tool carriage; a'spring tending to hold the tool post-against its cam'bar so that as the .tool carriage is traversed thetool' will be controlledby the can( bar; chucks mounted on the base for holding the work; and independent means for driving the chucks.

11. The combination in a boring machine, of a boringbarbrficiform cross section guides in the recesses; tool carriages mounta ed on theguides; and means for traversing said tool carriages. v

12. The combination in a boring machine, of a boring bar recessed at each side; a tool carriage mounted in each recess, the major "portion of the tool carriage being located in the recess. v

13. The combination in a boring machine, of a boring bar having a V-shaped groove in one side; guides within the groove; a tool carriage mounted in the guides; a cam bar located in the base of the groove; a tool post mounted on the carriage and controlled by the cam; and means for feeding the carriage longitudinally.

14:. The combination in a boring machine,

" of a boring bar having a deep V-shaped recess at each side; a longitudinal guide within each recess; a cam bar located at the base of each recess; a tool carriage mounted in each guide; and a tool 0st mounted in each carriage and controlle by the-cam bar.

, 15. The combination in a boring machine, of a boring bar; a tool carriage mounted on the bar; a cam bar carried by the boringv bar; a feed screw; means detachably con trolled by the cam bar; and means for longitudinally moving the cam bar when the carriage is stationary to project the tool so thatit will cut an abrupt shoulder in the work.

16. The combination in a boring machine, of a boring bar having a deep longitudinal recess therein; a tool carriage mounted in the recess; a tool post on the carriage; a cam bar at the base of the recess arranged to.

actuate the tool post; a-feed screw; means on the carriage for engaging the feed screw so that when the carriage is' disengaged from the. feed screw the cam bar will be moved longitudinally and will. cause the tool post to move. j I 17. The combination in a boring machine, of a boring bar having a longitudinal recess therein; 'a toolcarriage mounted in the re-- cess; means for feeding the carriage longitudinally on the boring bar; a tool' post; a cam "bar located in the recess andarranged to project the post; a spring for retracting,

the tool post; and lever mechanism controlled by a cam on the cam bar for positivel'yretracting the tool post;

r ERNEST J. RoLL It is hereby certifi ed that Letters 'Patent'No. 1,230,034, granted June 12, 1917,-

upon the application of Ernest J. Rollingstof Philadelphia, Pennsylvania, for an improvement in Boring-Machines, were erroneously issued to the inventoiysaid Rollings, as owner of said invention, Whereas said Letters Patent should hare been issued to Newton Machine Tool Works, Incorporated, qfPh'iladelpMa, Pennsyl'vanea,

a corporation of Pennsylvania, as assignee of the entire interest in said invention,

as shown by the records of this Office; and that the said Letters Patent should.

be read with this correction therein that the same may conform to the record of the case in the Patent Ofice.

Signed and sealed this 26th day of Jane, A. D., 1917.

{SEAL} n. F. WHITEHEAD,

Y Acting Commissioner of Patents. 

